Since two NYPD officers were killed last Saturday, a number of social media posts allegedly threatening police have led to arrests.

A total of six New Yorkers have been arrested for threatening police officers since the ambush shooting of two NYPD cops in Brooklyn on Saturday. On Thursday, Reuters reported two further arrests were made relating to alleged threats against police officers.

Sergeant Carlos Nieves said that the six arrestees have been charged with making terror threats or making false 911 calls. One of the latest suspects, 41-year-old Tyrone Melville, was arrested Wednesday after allegedly calling the precinct of slain officer Rafael Ramos and asking if the bullets had been removed from the dead officer's head so "he could kill more cops." Melville was charged with making terroristic threats and aggravated harassment.

A second individual arrested Wednesday, 26-year-old Jose Maldonado, was charged with making terrorist threats after reportedly posting to Facebook threats to kill police officers, which included posting pictures of weapons. He reportedly told cops that he'd "had a little too much to drink" when he posted the comments.

"All threats against members of the NYPD are taken seriously and are investigated immediately to determine the credibility and origin of the information," said Nieves.

On Saturday, officers Rafael Ramos, 40, and Wenjian Liu, 32, were shot dead in their patrol car by 28-year-old Ismaaiyl Brinsley, who before the shooting posted an image to Instagram with the message "I'm putting wings on pigs today. They take 1 of ours ... let's take 2 of theirs." After killing the officers Brinsley killed himself at a nearby subway station.